Touch display device

ABSTRACT

A touch display device includes a substrate, a plurality of touch electrodes, a plurality of touch signal lines and a plurality of dummy signal lines disposed on the substrate. The touch electrodes are arranged in i number of touch electrode columns and j number of touch electrode rows, the touch signal lines and the dummy signal lines are divided into i number of groups, each of the groups includes j number of touch signal lines and k number of dummy signal lines, and j number of touch signal lines are disposed between a portion of the k number of dummy signal lines and a remaining portion of the k number of dummy signal lines in each of the i number of groups, wherein i, j, and k are positive integers greater than or equal to two.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation application and claims priority ofU.S. patent application Ser. No. 16/920,761, filed on Jul. 6, 2020,which is a continuation-in-part and claims priority of U.S. patentapplication Ser. No. 16/283,811, filed on Feb. 24, 2019, and the entirecontents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a touch display device, and moreparticularly, to an in-cell touch display device that can reduce thedifference in RC loading between different portions.

2. Description of the Prior Art

Touch devices have been widely applied to display panels of all kinds ofelectronic products to form touch display devices. This allows users tocommunicate directly with electronic products instead of usingtraditional input devices such as a keyboard or mouse. The volume ofelectronic products can thereby be reduced and the convenience ofcommunication between human and computer can be enhanced. In recentyears, the industry has been devoted to developing an in-cell touchdisplay device, wherein the touch device is integrated into the displaypanel to minimize the volume of the touch display device.

Among currently available in-cell touch display devices, one structureincludes a common electrode of the display panel, divided into multipletouch electrodes arranged like a checker board, in which the touchelectrodes are separated from each other. In this structure, a portioninside the touch electrode overlaps conductive lines of other conductivelayers in the vertical projection direction, and the pattern or area ofthis overlapping portion inside the touch electrode may be differentfrom those of the portion at the edge of the touch electrode; differentareas therefore cause different RC (Resistive-Capacitive) loadings indifferent portions of the touch electrode. Signals will be transmitteddifferently at the edge of the touch electrode compared to within thetouch electrode, making the signal processing harder.

SUMMARY OF THE INVENTION

It is therefore an objective of the present invention to solve theabove-mentioned technical problem by reducing the difference in signaltransmission or RC loading between the edges of touch electrodes andinside the touch electrodes in the touch display device.

In order to accomplish this, the present invention provides a touchdisplay device including a display region and a peripheral region. Thetouch display device includes a substrate, a plurality of scan lines, aplurality of data lines, a plurality of thin film transistors, aplurality of pixel electrodes, a plurality of touch electrodes, aplurality of touch signal lines and a plurality of dummy signal lines.The plurality of scan lines and the plurality of data lines are disposedon the substrate. The plurality of thin film transistors are disposed onthe substrate, wherein each of the thin film transistors is electricallyconnected to a corresponding scan line of the plurality of scan linesand a corresponding data line of the plurality of data lines. Theplurality of pixel electrodes are disposed on the substrate and in thedisplay region, wherein each of the pixel electrodes is electricallyconnected to a drain of a corresponding thin film transistor of theplurality of thin film transistors. The plurality of touch electrodesand the plurality of touch signal lines are disposed on the substrate,wherein each of the touch signal lines is electrically connected to acorresponding touch electrode of the plurality of touch electrodes. Theplurality of dummy signal lines are disposed on the substrate. Theplurality of touch electrodes are arranged in i number of touchelectrode columns in a first direction and arranged in j number of touchelectrode rows in a second direction, the first direction is notparallel to the second direction, the plurality of touch signal linesand the plurality of dummy signal lines are divided into i number ofgroups in the first direction, each of the i number of groups comprisesj number of touch signal lines of the plurality of touch signal linesand k number of dummy signal lines of the plurality of dummy signallines, and the j number of touch signal lines are disposed between aportion of the k number of dummy signal lines and a remaining portion ofthe k number of dummy signal lines in each of the i number of groups,wherein i, j, and k are positive integers greater than or equal to two.

In order to accomplish this, the present invention provides a touchdisplay device including a display region and a peripheral region. Thetouch display device comprises a substrate, a plurality of scan linesand a plurality of data lines disposed on the substrate, a plurality ofthin film transistors disposed on the substrate, a plurality of pixelelectrodes disposed on the substrate and in the display region, and aplurality of touch electrodes and a plurality of touch signal linesdisposed on the substrate. Each of the thin film transistors iselectrically connected to a corresponding scan line of the plurality ofscan lines and a corresponding data line of the plurality of data lines,each of the pixel electrodes is electrically connected to a drain of acorresponding thin film transistor of the plurality of thin filmtransistors, and each of the touch signal lines is electricallyconnected to a corresponding touch electrode of the plurality of touchelectrodes. In the display region, three data lines of the plurality ofdata lines are located between two touch signal lines of the pluralityof touch signal lines, and in the peripheral region, one of the twotouch signal lines is at least partially overlapped with one of thethree data lines, and two other data lines of the three data lines areat least partially overlapped with each other.

In order to accomplish this, the present invention provides a touchdisplay device. The touch display device includes a display region and aperipheral region disposed by at least one side of the display region.The touch display device includes a substrate, a plurality of scanlines, a plurality of data lines, a plurality of thin film transistors,a first insulating layer, a first transparent conductive layer, a secondinsulating layer, a plurality of contact holes, a second transparentconductive layer, and a plurality of touch signal lines. The scan linesand the data lines are disposed on the substrate. The thin filmtransistors are disposed on the substrate, wherein each of the thin filmtransistors is electrically connected to a corresponding scan line ofthe plurality of scan lines and a corresponding data line of theplurality of data lines. The first insulating layer is disposed on thethin film transistors. The first transparent conductive layer isdisposed on the first insulating layer, wherein the first transparentconductive layer includes a plurality of pixel electrodes disposed inthe display region, and each of the pixel electrodes is electricallyconnected to a drain of one of the thin film transistors. The secondinsulating layer is disposed on the first insulating layer and the firsttransparent conductive layer. The contact holes penetrate the firstinsulating layer and the second insulating layer, wherein each of thecontact holes exposes a portion of one of the pixel electrodes and aportion of the drain of one of the thin film transistors. The secondtransparent conductive layer is disposed on the second insulating layer,wherein the second transparent conductive layer includes a plurality oftouch electrodes and a plurality of connecting electrodes, wherein eachof the connecting electrodes extends into at least one of the contactholes, and is in contact with the portion of one of the pixel electrodesand the portion of the drain of one of the thin film transistors. Thetouch signal lines are disposed on the substrate, wherein each of thetouch signal lines is electrically to a corresponding touch electrode ofthe plurality of touch electrodes.

In the touch display device of the present invention, the touchelectrodes include the protruding portions at the edges (or thedisconnected locations). The overlapping areas of the touch electrodesand the scan lines at the edges of the touch electrodes are equal to theoverlapping areas of the touch electrodes and the scan lines inside thetouch electrodes, thus the difference between the resistive-capacitiveloading of the touch electrodes and the scan lines at the edges of thetouch electrodes and the resistive-capacitive loading of the touchelectrodes and the scan lines inside the touch electrodes can bereduced, thereby achieving a better signal transmission effect.

These and other objectives of the present invention will no doubt becomeobvious to those of ordinary skill in the art after reading thefollowing detailed description of the preferred embodiment that isillustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram illustrating a top view of a touch displaydevice according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a top view of one of thetouch electrodes of the touch display device according to the firstembodiment of the present invention.

FIG. 3 is a schematic diagram illustrating a top view of touchelectrodes, dummy signal lines, and touch signal lines of the touchdisplay device according to the first embodiment of the presentinvention.

FIG. 4 is a schematic diagram illustrating a top view of a portion of adisplay region of the touch display device according to the firstembodiment of the present invention.

FIG. 5 is a schematic diagram illustrating a cross-sectional view of asub-pixel of the touch display device according to the first embodimentof the present invention.

FIG. 6 is a schematic diagram illustrating a top view of a portion ofthe sub-pixel of the touch display device according to the firstembodiment of the present invention.

FIG. 7A, FIG. 7B, FIG. 7C and FIG. 7D are schematic diagramsillustrating the configuration of data lines, touch signal lines, dummysignal lines and conductive connecting pads and a cross-sectional viewof a metal layer transferring structure of the touch display deviceaccording to the first embodiment of the present invention.

FIG. 8A and FIG. 8B are schematic diagrams illustrating theconfiguration of data lines, touch signal lines and dummy signal linesand a cross-sectional view of a metal layer transferring structure of atouch display device according to a variant embodiment of the presentinvention.

FIG. 9 is a schematic diagram illustrating the configuration of datalines, touch signal lines and dummy signal lines of a touch displaydevice according to another variant embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating a top view of a portion ofthe sub-pixels of the touch display device according to a firstmodification of the first embodiment of the present invention.

FIG. 11 is a schematic diagram illustrating a top view of a portion ofthe sub-pixels of the touch display device according to a secondmodification of the first embodiment of the present invention.

FIG. 12 is a schematic diagram illustrating an enlargement of a region Xin FIG. 1.

FIG. 13 is a schematic diagram illustrating an enlargement of a region Yin FIG. 1.

FIG. 14 is a schematic diagram illustrating a top view of a portion ofthe display region of the touch display device according to a secondembodiment of the present invention.

FIG. 15 is a schematic diagram illustrating a cross-sectional view of asub-pixel of the touch display device according to the second embodimentof the present invention.

DETAILED DESCRIPTION

To provide a better understanding of the present invention to thoseskilled in the technology, preferred embodiments will be detailed asfollows. The preferred embodiments of the present invention areillustrated in the accompanying drawings with numbered elements toelaborate on the contents and effects to be achieved. It should be notedthat the drawings are simplified schematics, and therefore show only thecomponents and combinations associated with the present invention, so asto provide a clearer description of the basic architecture or method ofimplementation. The components would be complex in reality. In addition,for ease of explanation, the components shown in the drawings may notrepresent their actual number, shape, and dimensions; details can beadjusted according to design requirements.

Refer to FIGS. 1-7B. FIG. 1 is a schematic diagram illustrating a topview of a touch display device according to a first embodiment of thepresent invention, FIG. 2 is a schematic diagram illustrating a top viewof one of the touch electrodes of the touch display device according tothe first embodiment of the present invention, FIG. 3 is a schematicdiagram illustrating a top view of touch electrodes, dummy signal lines,and touch signal lines of the touch display device according to thefirst embodiment of the present invention, FIG. 4 is a schematic diagramillustrating a top view of a portion of a display region of the touchdisplay device according to the first embodiment of the presentinvention, FIG. 5 is a schematic diagram illustrating a cross-sectionalview of a sub-pixel of the touch display device according to the firstembodiment of the present invention, FIG. 6 is a schematic diagramillustrating a top view of a portion of the sub-pixel of the touchdisplay device according to the first embodiment of the presentinvention, and FIG. 7A and FIG. 7B are schematic diagrams illustratingthe configuration of data lines, touch signal lines, dummy signal lines,and conductive connecting pads of the touch display device according tothe first embodiment of the present invention. For simplifying thedrawings and for ease of comprehension, FIG. 1 only shows touchelectrodes 102 and a portion of touch signal lines SSL and omits dummysignal lines DSL in the display region DR, and FIG. 4 omits the firsttransparent conductive layer 108 and the pixel electrodes PE therein.The touch display device 10 of this embodiment is an in-cell touchdisplay device, but is not limited thereto. As shown in FIG. 1, asubstrate 100 of the touch display device 10 includes a display regionDR and a peripheral region PR disposed by at least one side of thedisplay region DR. In this embodiment, the peripheral region PRsurrounds the display region DR, but it is not limited thereto. Thesubstrate 100 may be a rigid substrate, such as a glass substrate,plastic substrate, quartz substrate, or sapphire substrate, or thesubstrate 100 may be a flexible substrate including materials such aspolyimide (PI) or polyethylene terephthalate (PET) for example, but isnot limited thereto. A plurality of touch electrodes 102 are disposed inthe display region DR of the substrate 100, and the touch electrodes 102are separated from each other. The touch electrodes 102 may be arrangedin i number of columns and j number of rows, wherein i, j are positiveintegers greater than or equal to two. Each of the touch electrode rows102R extends in a first direction D1, each of the touch electrodecolumns 102C extends in a second direction D2, and the first directionD1 and the second direction D2 are not parallel. The first direction D1is perpendicular to the second direction D2 in this embodiment, but itis not limited thereto. Additionally, the touch electrodes 102 in thisembodiment serve as the common electrodes in the display period of thetouch display device 10, and the touch electrodes 102 are used forsensing the location touched by the user in the touch sensing period ofthe touch display device 10, but this is not limited thereto. The touchdisplay device 10 includes a plurality of touch signal lines SSLdisposed on the substrate 100. Each of the touch signal lines SSLsubstantially extends along the second direction D2, and is electricallyconnected to a corresponding one of the touch electrodes 102.Accordingly, each of the touch signal lines SSL is electricallyconnected to a corresponding touch electrode 102 to transmit and/orreceive touch related signals. The touch signal lines SSL are notlimited to straight lines as shown in FIG. 1 and FIG. 2, however; thetouch signal line SSL can extend in a zigzagging fashion along thesecond direction D2. This will be detailed later. In this embodiment,touch electrodes 102 are arranged in eighteen columns (i=18) andthirty-two rows (j=32), and the number of the touch electrodes 102 arefive hundred and seventy-six, but not limited thereto. In otherembodiments, the arrangement and/or the number of the touch electrodes102 may be different according to different designs of the touch displaydevice 10. As shown in FIG. 1, each touch electrode column 102C includesj number of touch electrodes 102, wherein j number of touch signal linesSSL are disposed corresponding to every touch electrode column 102C, andeach touch signal line SSL is electrically connected to a correspondingtouch electrode 102. As shown in FIG. 1, each touch signal line SSL iselectrically connected to the corresponding touch electrode 102 througha connecting structure 103. For example, in an embodiment, the touchsignal lines SSL are formed of a metal layer and the touch electrodes102 are formed of a transparent conductive layer disposed above themetal layer, and at least one insulating layer is disposed between themetal layer and the transparent conductive layer. At least one contacthole can be formed in the insulating layer to expose a portion of thetouch signal line SSL. A portion of the transparent conductive layerfills into the at least one contact hole when the transparent conductivelayer is formed, so as to form the connecting structure 103 that canelectrically connect the touch signal line SSL and the touch electrode102 formed of different layers, but is not limited thereto. In anotherembodiment, the touch signal lines SSL are formed of a metal layer andthe touch electrodes 102 are formed of a transparent conductive layerdisposed below the metal layer, and at least one insulating layer isdisposed between the metal layer and the transparent conductive layer.At least one contact hole can be formed in the insulating layer toexpose a portion of the touch electrode 102. A portion of the metallayer fills into the at least one contact hole when the metal layer isformed, so as to form the connecting structure 103 that can electricallyconnect the touch signal line SSL and the touch electrode 102 formed ofdifferent layers, but is not limited thereto. In addition, in FIG. 1,each touch signal line SSL penetrates a region corresponding to j numberof touch electrodes 102 in one of the touch electrode columns 102C, andeach touch signal line SSL is overlapped with j number of touchelectrodes 102 in the corresponding touch electrode column 102C in thedirection perpendicular to the substrate 100, but this is not limitedthereto. As shown in FIG. 1, the touch electrode column 102C₁ includes jnumber of touch electrodes 102 a-102 j, j number of touch signal linesSSL are disposed in a region corresponding to the touch electrode column102C₁, the leftmost touch signal line SSL_1 extends in the seconddirection D2 to be electrically connected to the uppermost touchelectrode 102 a of the touch electrode column 102C₁ through a connectingstructure 103, and is overlapped with j number of touch electrodes 102of the touch electrode column 102C₁. The touch signal line SSL_2adjacent to the leftmost touch signal line SSL_1 extends in the seconddirection D2 to be electrically connected to the touch electrode 102 badjacent to the uppermost touch electrode 102 a of the touch electrodecolumn 102C₁ through another connecting structure 103, and furtherextends to the region corresponding to the uppermost touch electrode 102a, thus the touch signal line SSL_2 is overlapped with j number of touchelectrodes 102 of the touch electrode column 102C₁. The touch signallines SSL_3-SSL_j are similar to the touch signal line SSL_2 and areoverlapped with j number of touch electrodes 102 of the touch electrodecolumn 102C₁, and therefore description thereof is not repeated. Inother embodiments, the leftmost touch signal line SSL_1 is overlappedwith j number of touch electrodes 102 of the touch electrode column102C₁. The touch signal line SSL_2 extends in the second direction D2 tobe electrically connected to the touch electrode 102 b and does notextend to the region corresponding to the uppermost touch electrode 102a, thus the touch signal line SSL_2 is overlapped with (j −1) number oftouch electrodes 102 of the touch electrode column 102C₁ (i.e. touchelectrodes 102 b-102 j). The touch signal lines SSL_3-SSL_j are similarto the touch signal line SSL_2 and are respectively overlapped with (j−2) number of touch electrodes 102 to one touch electrode 102 of thetouch electrode column 102C₁, and therefore description thereof is notrepeated.

FIG. 2 illustrates a top view of one of the touch electrodes 102, aportion of the dummy signal lines DSL, and a portion of the touch signallines SSL. The touch electrode 102 in FIG. 2 may be one of the touchelectrodes 102 in the first touch electrode column 102C₁ on theleft-side of FIG. 1. As shown in FIG. 2, the touch display device 10 ofthis embodiment further includes a plurality of dummy signal lines DSLsubstantially extending along the second direction D2 and substantiallyparallel to the touch signal lines SSL. The dummy signal lines DSL mayalso extend in a zigzagging fashion along the second direction D2, butare not limited thereto. Regarding the touch electrode column 102C₁, thedummy signal lines DSL penetrate a region corresponding to all the touchelectrodes 102 in the touch electrode column 102C₁, but this is notlimited thereto. The dummy signal lines DSL are not electricallyconnected to the touch electrodes 102. In this embodiment, the touchelectrodes 102 are arranged in i number of columns and j number of rows,and the touch display device 10 includes plural touch signal lines SSLand plural dummy signal lines DSL, wherein the number of touch signallines SSL is equal to the product of i and j. The touch signal lines SSLand the dummy signal lines DSL are divided into i number of groups inthe first direction D1, each group includes j number of touch signallines SSL and k number of dummy signal lines DSL, wherein i, j, k arepositive integers greater than or equal to two. In a group of the touchsignal lines SSL and the dummy signal lines DSL, j number of touchsignal lines SSL are disposed between a portion of k number of dummysignal lines DSL and the remaining portion of k number of dummy signallines DSL. In other words, j number of touch signal lines SSL aredisposed between m number of dummy signal lines DSL and (k-m) number ofdummy signal lines DSL, wherein m is an integer greater than or equal toone, and m is smaller than k. For example, the number of touch signallines SSL is five hundred and seventy-six (the product of i and j) whenthe touch electrodes 102 are arranged in eighteen columns and thirty-tworows (i.e. i is 18 and j is 32). The touch signal lines SSL and thedummy signal lines DSL of the touch display device 10 are divided intoeighteen groups in the first direction D1, the number of touch signallines SSL is thirty-two and the number of dummy signal lines DSL iseight (i.e. k is 8) in each group of the touch signal lines SSL and thedummy signal lines DSL. Thirty-two touch signal lines SSL in a group canbe disposed between four dummy signal lines DSL and the remaining fourdummy signal lines DSL, three dummy signal lines DSL and the remainingfive dummy signal lines DSL, two dummy signal lines DSL and theremaining six dummy signal lines DSL, or one dummy signal line DSL andthe remaining seven dummy signal lines DSL, but is not limited thereto.Additionally, the arrangement of the touch signal lines SSL and thedummy signal lines DSL in every group can be the same or different. Forexample, in an embodiment, j number of touch signal lines SSL in everygroup of touch signal lines SSL and dummy signal lines DSL can bedisposed between m number of dummy signal lines DSL and (k-m) number ofdummy signal lines DSL, but this is not limited thereto. In otherembodiments, j number of touch signal lines SSL in at least one groupcan be disposed between m number of dummy signal lines DSL and (k-m)number of dummy signal lines DSL, and j number of touch signal lines SSLin at least another group can be disposed between n number of dummysignal lines DSL and (k-n) number of dummy signal lines DSL, wherein nis an integer greater than or equal to one, n is smaller than k, and nis different from m. Table 1 illustrates arrangements of the touchsignal lines and the dummy signal lines of an embodiment in every groupin sequence. The numbers in the first row in Table 1 respectivelyrepresent every group of the touch signal lines SSL and the dummy signallines DSL in the first direction D1, and numbers 1-18 represent thegroups of the touch signal lines SSL and the dummy signal lines DSL fromleft to right in the touch display device 10 in FIG. 1 in sequence. Thesecond row in Table 1 illustrates the arrangement of the touch signallines SSL and the dummy signal lines DSL in each group, the third row inTable 1 illustrates numbers of the touch signal lines SSL and the dummysignal lines DSL according to the arrangement in the second row, and thefourth row in Table 1 illustrates the sum of the number of the touchsignal lines SSL and the number of the dummy signal lines DSL.

TABLE 1 Group 1 2 3 Arrange- DSL SSL DSL DSL SSL DSL DSL SSL DSL mentNumber 4 32 4 3 32 5 2 32 6 Sum 40 40 40 Group 4 5 6 Arrange- DSL SSLDSL DSL SSL DSL DSL SSL DSL ment Number 4 32 4 3 32 5 2 32 6 Sum 40 4040 Group 7 8 9 Arrange- DSL SSL DSL DSL SSL DSL DSL SSL DSL ment Number4 32 4 3 32 5 2 32 6 Sum 40 40 40 Group 10 11 12 Arrange- DSL SSL DSLDSL SSL DSL DSL SSL DSL ment Number 5 32 3 4 32 4 3 32 5 Sum 40 40 40Group 13 14 15 Arrange- DSL SSL DSL DSL SSL DSL DSL SSL DSL ment Number5 32 3 4 32 4 3 32 5 Sum 40 40 40 Group 16 17 18 Arrange- DSL SSL DSLDSL SSL DSL DSL SSL DSL ment Number 5 32 3 4 32 4 3 32 5 Sum 40 40 40

As shown in Table 1, five hundred and seventy-six touch signal lines SSLand one hundred and forty-four dummy signal lines DSL are divided intoeighteen groups in the first direction D1, where each group includesthirty-two touch signal lines SSL and eight dummy signal lines DSL. Ineach of groups one, four, seven, eleven, fourteen, and seventeen,thirty-two touch signal lines SSL are disposed between four dummy signallines DSL and the remaining four dummy signal lines DSL. In each ofgroups two, five, eight, ten, twelve, thirteen, fourteen, sixteen, andeighteen, thirty-two touch signal lines SSL are disposed between threedummy signal lines DSL and the remaining five dummy signal lines DSL.Additionally, In each of groups three, six, and nine, thirty-two touchsignal lines SSL are disposed between two dummy signal lines DSL and theremaining six dummy signal lines DSL. FIG. 3 illustrates a top view of aportion of the touch electrodes 102, the dummy signal lines DSL, and thetouch signal lines SSL according to Table 1. FIG. 3 only includes sixtouch electrodes 102 in the touch electrode columns 102C₁-102C₃ of the1^(st)-3^(rd) columns on the left and the touch electrode rows102R_(j-1)-102R_(j) of the (j −1)^(th)-j^(th) rows at the bottom ofFIG. 1. As shown in FIG. 3, a gap is located between two adjacent touchelectrodes 102, one of the dummy signal lines DSL located on one side ofat least one group of the touch signal lines SSL and the dummy signallines DSL is located in the gap and is not overlapped with the touchelectrode 102, but this is not limited thereto. For example, in FIG. 3,a dummy signal line DSL at the furthest right in the group one isdisposed in a gap between two adjacent touch electrodes 102, and a dummysignal line DSL at the furthest right in the group two is disposed inanother gap between two adjacent touch electrodes 102. In otherembodiments, none of the dummy signal lines DSL is disposed in a gapbetween two adjacent touch electrodes 102, and each touch signal lineSSL and each dummy signal line DSL in every group of the touch signallines SSL and the dummy signal lines DSL can be overlapped with j touchelectrodes 102 in the corresponding touch electrode column 102C. It isnoteworthy that the number of touch signal lines SSL and the number ofdummy signal lines DSL in each group of the touch signal lines SSL andthe dummy signal lines DSL in this embodiment (which are respectivelythirty-two and eight) are only an example, and not limited thereto. Thenumbers of the touch signal lines SSL and the dummy signal lines DSLdisposed in each group are obtained according to the arrangement and thenumber of the touch electrodes and the resolution of the touch displaydevice 10. This is detailed in the following paragraph.

As shown in FIG. 2, each of the touch electrodes 102 corresponds to aplurality of pixels PX, wherein the pixels PX are disposed in thedisplay region DR in FIG. 1. In this embodiment, the resolution of thetouch display device 10 is 720×1440, i.e. the pixels PX are arranged in720 pixel columns and 1440 pixel rows. Since the touch electrodes 102 ofthis embodiment are arranged in eighteen touch electrode columns andthirty-two touch electrode rows, each of the touch electrodes 102corresponds to a pixel matrix with 40×45 pixels. Additionally, each ofthe touch signal lines SSL and each of the dummy signal lines DSLrespectively are disposed adjacent to a corresponding pixel column. Inthis embodiment, one touch signal line SSL or one dummy signal line DSLis disposed adjacent to one pixel column or disposed between twoadjacent pixel columns, but is not limited thereto. In this embodiment,one pixel includes three sub-pixels (e.g., RGB sub-pixels) and one pixelcolumn includes three sub-pixel columns, but is not limited thereto. Asdescribed above, the touch signal lines SSL and the dummy signal linesDSL of the touch display device 10 are divided into eighteen groups inthe first direction D1, the number of touch signal lines SSL isthirty-two and the number of dummy signal lines DSL is eight in eachgroup of the touch signal lines SSL and the dummy signal lines DSL, andeach of the touch electrode columns corresponds to forty pixel columnsin the first direction D1. Therefore, in a region corresponding to onetouch electrode column, thirty-two touch signal lines SSL in a group ofthe touch signal lines SSL and the dummy signal lines DSL arerespectively disposed adjacent to thirty-two of the forty pixel columns,and eight dummy signal lines DSL in the group of the touch signal linesSSL and the dummy signal lines DSL are respectively disposed adjacent tothe remaining eight of the forty pixel columns. Accordingly, the pixelsPX can have an identical aperture ratio to prevent regional differencesin the visual effect of the touch display device 10. In addition, asshown in FIG. 3, the touch display device 10 not only includes the dummysignal lines DSL overlapped by the touch electrodes 102, but alsoincludes the dummy signal lines DSL that are not overlapped by the touchelectrodes 102 (ex. the dummy signal line DSL disposed between twoadjacent touch electrodes 102). The shape and the size of the dummysignal lines DSL that are not overlapped by the touch electrodes 102 canbe the same as other dummy signal lines DSL that are overlapped by thetouch electrodes 102. The size of the dummy signal lines DSL can (forexample) be the width in the first direction D1 and the height in thesecond direction D2. The shape of the dummy signal lines DSL can (forexample) be the fashion or the angle of bending. In this embodiment, thewidth of the dummy signal lines DSL is substantially the same as thewidth of the touch signal lines SSL in the display region DR, and theaperture ratios of the pixels PX can be the same, but this is notlimited thereto. As shown in FIG. 4, each pixel PX of this embodimentcan be formed of three sub-pixels SP arranged along the first directionD1 in sequence, and the sub-pixels SP can be arranged in r number ofcolumns and s number of rows, where r and s are positive integersgreater than or equal to two. According to the number of pixels PXmentioned above, r=2160 (three times the number of columns of the pixelsPX) and s=1440 in this embodiment. In other embodiments, each pixel PXcan also be formed of one, two, or more than three of the sub-pixels SP.In addition, since the number of the touch electrode columns 102C₁-102C₁is i and the number of the touch electrode rows 102R₁-102R_(i) is j, thetouch signal lines SSL and the dummy signal lines DSL can be dividedinto i number of groups in the first direction D1, and j number of touchsignal lines SSL and k number of dummy signal lines DSL can be disposedin every group of the touch signal lines SSL and the dummy signal linesDSL, wherein k is equal to (r/(3 i))-j. In one group of the touch signallines SSL and the dummy signal lines DSL, j number of touch signal linesSSL are disposed between a portion of k number of dummy signal lines DSLand the remaining portion of k number of dummy signal lines DSL. Forexample, thirty-two touch signal lines SSL and eight dummy signal linesDSL are disposed in each group of the touch signal lines SSL and thedummy signal lines DSL when the touch electrodes 102 are arranged ineighteen columns and thirty-two rows and the resolution of the touchdisplay device 10 is 720×1440. Additionally, thirty-two touch signallines SSL are disposed between a portion of eight dummy signal lines DSLand the remaining portion of eight dummy signal lines DSL in each groupof the touch signal lines SSL and the dummy signal lines DSL. In thisembodiment, one touch signal line SSL or one dummy signal line DSL isdisposed corresponding to every three columns of the sub-pixels SP (maybe also called as three sub-pixel columns), the touch signal line SSL isdisposed adjacent to one sub-pixel column or disposed between twoadjacent sub-pixel columns, and the dummy signal line DSL can also bedisposed adjacent to one sub-pixel column or disposed between twoadjacent sub-pixel columns, but this is not limited thereto. It isnoteworthy that the values of i, j, k, r, s, and the resolution of thepresent invention are not limited to the above description, and thevalues of i, j, k, r, s, and the resolution given above are onlyexamples.

As shown in FIG. 4, the touch display device 10 includes a plurality ofscan lines SL and a plurality of data lines DL in the display region DR.The scan lines SL extend in the first direction D1, and each scan lineSL is disposed adjacent to one row of the sub-pixels SP. An extendingdirection of the data lines DL is not parallel to the first directionD1, the data lines DL substantially extend along the second directionD2, and the scan lines SL cross the data lines DL to define a pluralityof sub-pixels SP. In this embodiment, the shape of a sub-pixel SP in thetop view is similar to a parallelogram, but is not limited thereto. Inthis embodiment, the shape of a sub-pixel SP is similar to aparallelogram, the top edge and the bottom edge are parallel to thefirst direction D1, and the side edges are not parallel to the firstdirection D1 and the second direction D2. For example, in adjacent twosub-pixel rows SPR_(h), SPR_(h−1), the side edges of the parallelogramsof the sub-pixels SP in the sub-pixel row SPR_(h) and the seconddirection D2 have a positive included angle θ (ex. 7 degrees), and theside edges of the parallelograms of the sub-pixels SP in the sub-pixelrow SPR_(h−1) and the second direction D2 have a negative included angle−θ (ex. −7 degrees). The parallelogram shapes of the sub-pixels SP inthe adjacent rows are not the same but are symmetrical to an imaginaryline parallel to the first direction D1. Therefore, two adjacentsub-pixels SP in the second direction D2 form a shape “<” or “>”, andthe sub-pixels SP form a bending column in the second direction D2, butthis is not limited thereto. FIG. 10 is a schematic diagram illustratinga top view of a portion of the sub-pixels according to a firstmodification of the first embodiment of the present invention. In thismodification, the shape of the sub-pixels SP can be a rectangle. FIG. 11is a schematic diagram illustrating a top view of a portion of thesub-pixels according to a second modification of the first embodiment ofthe present invention. In this modification, the shape of a sub-pixel SPcan be “<” or “>”, and the sub-pixels SP having “>” shape and thesub-pixels SP having “<” shape can be arranged alternately in the seconddirection D2.

In addition, as shown in FIG. 4, each of the touch signal lines SSL isdisposed adjacent to one of the data lines DL, and each of the dummysignal lines DSL is also disposed adjacent to one of the data lines DL.In the display region DR, the data lines DL, the touch signal lines SSL,and the dummy signal lines DSL are substantially parallel to each other,and the data lines DL, the touch signal lines SSL, and the dummy signallines DSL extend along the side edges of the parallelograms of thesub-pixels SP. Therefore, the data lines DL, the touch signal lines SSL,and the dummy signal lines DSL can have the bended structure in thedisplay region DR in the second direction D2, but are not limitedthereto. In addition, the touch signal lines SSL have a first width W1,and the data lines have a second width W2, where W1≥1.5*W2. For example,the first width W1 can be 7 micrometers and the second width W2 can be4.5 micrometers in this embodiment. In this design, the resistance ofthe touch signal lines SSL can be reduced by increasing the width of thetouch signal lines SSL, and the accuracy of touch sensing can thereby beenhanced.

As shown in FIG. 4, FIG. 5, and FIG. 6, the touch display device 10includes a first metal layer 104, a second metal layer 106, a firsttransparent conductive layer 108, and a second transparent conductivelayer 110. The first metal layer 104 is disposed on the substrate 100and includes the scan lines SL. The second metal layer 106 is disposedon the first metal layer 104 and includes the data lines DL, the touchsignal lines SSL, and the dummy signal lines DSL, but is not limitedthereto. In a modification, the second metal layer 106 includes the datalines DL, a third metal layer includes the touch signal lines SSL andthe dummy signal lines DSL, and the third metal layer is disposed on thesecond metal layer 106. Since at least one insulating layer is disposedbetween the second metal layer 106 and the third metal layer, the touchsignal lines SSL and the dummy signal lines DSL in this modification mayoverlap the data lines DL in a vertical projection direction V toenhance the aperture ratio, but this is not limited thereto. The firsttransparent conductive layer 108 is disposed on the first metal layer104 and the second metal layer 106 and includes a plurality of pixelelectrodes PE (as shown in FIG. 5 and FIG. 6), and each of the pixelelectrodes PE is disposed in one of the sub-pixels SP in the displayregion DR. The second transparent conductive layer 110 is disposed onthe first transparent conductive layer 108 and includes the touchelectrodes 102. Specifically, the second transparent conductive layer110 includes a plurality of common electrodes CE, and each of the commonelectrodes CE is disposed in one of the sub-pixels SP. Each of the touchelectrodes 102 is formed of the common electrodes CE of thecorresponding sub-pixels SP, and these common electrodes CE areelectrically connected to each other. Therefore, each touch electrode102 can include plural common electrodes CE covering the correspondingsub-pixels SP. Additionally, the second transparent conductive layer 110is disconnected between adjacent touch electrodes 102. In thisembodiment, the touch electrode 1021 can further include a plurality ofconnecting portions 102C, wherein two ends of each of the connectingportions 102C are respectively connected to the common electrodes CE oftwo adjacent sub-pixel rows (ex. sub-pixel rows SPR_(h), SPR_(h+1)),such that the common electrodes CE of different pixel rows can beelectrically connected to each other. As shown in FIG. 4, the connectingportions 102C of this embodiment are disposed between two sub-pixel rowsSPR_(h), SPR_(h+1) along a second scan line SL2 or the first directionD1, but this is not limited thereto. The common electrodes CE that formthe touch electrodes 102 of this embodiment can include at least onefirst opening (which may also be referred to as a slit) OP1, the firstopenings OP1 overlap the pixel electrodes PE in the vertical projectiondirection V, and the fringe electric field can be produced between thecommon electrodes CE and the pixel electrodes PE to make the liquidcrystal rotate due to the first openings OP1. Each of the commonelectrodes CE of this embodiment can include three first openings OP1,but the number of the first openings OP1 is not limited thereto. Inaddition, each of the touch electrodes 102 further includes a pluralityof second openings OP2, each second opening OP2 is disposedcorresponding to one touch signal line SSL, and each second opening OP2partially overlaps the corresponding touch signal line SSL in thevertical projection direction V. Each second opening OP2 extends alongthe corresponding touch signal line SSL. Therefore, each second openingOP2 can overlap a portion of one of the touch signal lines SSL in thevertical projection direction V. The overlapping area of the touchelectrodes 102 (or the common electrodes CE) and the touch signal linesSSL can be reduced to reduce the capacitive loading (C loading) betweenthe touch electrodes 102 and the touch signal lines SSL, and an improvedsignal transmission effect can be achieved. Additionally, in thisembodiment, each touch electrode 102 further includes a plurality ofsecond openings OP2 disposed corresponding to the dummy signal linesDSL. Each of the second openings OP2 overlaps a portion of the dummysignal line DSL in the vertical projection direction V, but is notlimited thereto. The size and the shape of the second openings OP2disposed corresponding to the dummy signal lines DSL can be the same asthat of the second openings OP2 disposed corresponding to the touchsignal lines SSL, but this is not limited thereto. In a modification,the second openings OP2 can be disposed corresponding to the touchsignal lines SSL only, and the second openings OP2 are not disposedcorresponding to the dummy signal lines DSL.

As shown in FIG. 4, the scan lines SL include a first scan line SL1 anda second scan line SL2. The first scan line SL1 is disposed between twoadjacent touch electrodes 1021, 1022 in the second direction D2. Thetouch electrode 1021 and the touch electrode 1022 are separated andelectrically isolated from each other. In this embodiment, the firstscan line SL1 is partially covered by an adjacent touch electrode 1021.For example, the touch electrode 1021 partially covering the first scanline SL1 includes a plurality of protruding portions 102P, theprotruding portions 102P are disposed on an edge 102E of the touchelectrode 1021 along the first scan line SL1 or the first direction D1,and each protruding portion 102P protrudes from the edge 102E to thefirst scan line SL1 in the second direction D2 to partially overlap thefirst scan line SL1. In addition, the second scan line SL2 is disposedbetween the sub-pixels SP covered by the corresponding touch electrode102. For example, the second scan line SL2 may be substantially disposedbetween two adjacent sub-pixel rows SPR_(h), SPR_(h+l), and eachconnecting portion 102C extends in the second direction D2 to cover aportion of the second scan line SL2. Additionally, in this embodiment,the protruding portions 102P extend across the first scan line SL1, andthe connecting portions 102C extend across the second scan line SL2. Anarea of a portion of the second scan line SL2 covered by the connectingportion 102C of one of the touch electrodes 102 (such as the touchelectrode 1021) is substantially equal to an area of a portion of thefirst scan line SL1 covered by the protruding portion 102P of one of thetouch electrodes 102. Accordingly, the overlapping area of the touchelectrode 102 and the scan line SL at the edge (or the disconnectionlocation) of the touch electrode 102 is substantially equal to theoverlapping area of the touch electrode 102 and the scan line SL insidethe touch electrode 102. The overlapping area of the first scan line SL1and the touch electrode 102 is substantially equal to the overlappingarea of the second scan line SL2 and the touch electrode 102, such thatthe difference between the C loading between the first scan line SL1 andthe touch electrode 102 and the C loading between the second scan lineSL2 and the touch electrode 102 can be reduced, and an improved signaltransmission effect can be achieved.

In the display region DR of the touch display device 10, each sub-pixelSP includes a thin film transistor T. The structures of the thin filmtransistor T and the sub-pixel SP are detailed hereinafter. As shown inFIG. 4, FIG. 5, and FIG. 6, the thin film transistor T of thisembodiment can be a bottom-gate thin film transistor, but it is notlimited thereto. In other embodiments, the thin film transistor T can bea top-gate thin film transistor. In addition, the thin film transistor Tcan be a low temperature poly-silicon (LTPS) thin film transistor, anindium gallium zinc oxide (IGZO) thin film transistor, or an amorphoussilicon thin film transistor, but it is not limited thereto. The thinfilm transistor T is disposed between the substrate 100 and the secondtransparent conductive layer 110. The thin film transistor T includes agate G, a source S, a drain D, and a semiconductor layer CH. The firstmetal layer 104 further includes the gate G of the thin film transistorT, wherein each of the scan lines SL is electrically connected to a gateG of at least one thin film transistor T. Each scan line SL can provideon/off signals to the gates G for controlling the thin film transistorsT and refreshing the display image. The second metal layer 106 furtherincludes the source S and the drain D of the thin film transistor T,wherein each of the data lines DL is electrically connected to a sourceS of at least one thin film transistor T. Each data line DL can provideimage gray level signals to the sources S of the thin film transistorsT. The first metal layer 104 and the second metal layer 106 are formedof metallic materials and therefore have low resistances, and the decayof the signal during transmission can be reduced. The first metal layer104 and the second metal layer 106 can be formed of the single metallayer or the multi-metal layers stacking together. The first metal layer104 and the second metal layer 106 can be a single metal layer includingaluminum, copper, titanium, or tungsten. The first metal layer 104 andthe second metal layer 106 can also be a composite metal layer such asmolybdenum/aluminum/molybdenum, titanium/aluminum/titanium,titanium/copper/titanium, or titanium/copper, but not limited thereto. Agate insulating layer GI is disposed on the gate G and covers the gateG, and the semiconductor layer CH is disposed between the gateinsulating layer GI and the source S and disposed between the gateinsulating layer GI and the drain D. The semiconductor layer CH may beamorphous silicon, poly-silicon, or metal oxides (such as indium galliumzinc oxide). The first insulating layer 112 is disposed between thesecond metal layer 106 (such as the drain D) and the first transparentconductive layer 108 (such as the pixel electrode PE). The secondinsulating layer 114 is disposed between the first transparentconductive layer 108 (such as the pixel electrode PE) and the secondtransparent conductive layer 110 (such as the common electrode CE). Thegate insulating layer GI, the first insulating layer 112, and the secondinsulating layer 114 can be silicon oxide, silicon nitride, or siliconoxynitride, but not limited thereto. The first transparent conductivelayer 108 and the second transparent conductive layer 110 can be indiumtin oxide (ITO), indium zinc oxide (IZO), or aluminum zinc oxide (AZO),but not limited thereto.

In this embodiment, the pixel electrode PE partially covers the drain Din the vertical projection direction V. The thin film transistor Tincludes a contact hole TH penetrating the second insulating layer 114and the first insulating layer 112. The contact hole TH exposes aportion of the pixel electrode PE and a portion of the drain D.Additionally, the contact hole TH of this embodiment includes a firstportion TH1 and a second portion TH2, wherein the first portion TH1exposes a portion of the pixel electrode PE, the second portion TH2exposes a portion of the drain D, and the first portion TH1 is disposedat a side of the second portion TH2, but it is not limited thereto. Thesecond transparent conductive layer 110 of this embodiment furtherincludes a connecting electrode 1101, and the connecting electrode 1101is separated and electrically isolated from the common electrode CE. Theconnecting electrode 1101 covers the contact hole TH and extends intothe contact hole TH, and the connecting electrode 1101 is in contactwith and electrically connected to both the drain D of the thin filmtransistor T and the pixel electrode PE exposed by the contact hole TH.Therefore, the pixel electrode PE is electrically connected to the drainD of the thin film transistor T through the connecting electrode 1101.In this embodiment, a portion of the pixel electrode PE exposed by thecontact hole TH has a third width W3, the contact hole TH has a diameterD (which may also be the length or width of the contact hole TH), and

${{\frac{1}{3}D} \leq {W3} \leq \frac{1}{2}}{D.}$

For example, the diameter D of the contact hole TH can be 6 micrometers,and the third width W3 can be greater than or equal to 2 micrometers andless than or equal to 3 micrometers, but not limited thereto. Accordingto the above relationship of the third width W3 and the diameter D, theconnecting electrode 1101 of this embodiment is ensured to beelectrically connected to the drain D and the pixel electrode PE, andthe probability of electrically disconnection between the pixelelectrode PE and the drain D of the thin film transistor T is reduced.According to the structure of the sub-pixel SP in this embodiment, thethickness of the first insulating layer 112 and the second insulatinglayer 114 may be adjusted to simultaneously optimize the capacitance ofthe storage capacitor and the loading between the data line DL and thecommon electrode CE. For example, the storage capacitance formed betweenthe pixel electrode PE and the common electrode CE can be increased byreducing the thickness of the second insulating layer 114. Additionally,the loading between the data line DL and the common electrode CE and theprobability of penetration of metallic materials can be reduced byincreasing the thickness of the first insulating layer 112.

FIG. 7A and FIG. 7B are respectively schematic diagrams illustratingenlargements of a portion and another portion of a region A in FIG. 1,FIG. 7C is a schematic diagram illustrating an enlargement of a region Bin FIG. 1, and FIG. 7D is a schematic diagram illustrating across-sectional diagram taken along line A-A′ in FIG. 7A. The touchdisplay device 10 of this embodiment includes an integrated circuit (IC)116 and at least one gate driving circuit 118 disposed in the peripheralregion PR and disposed on the substrate 100. The gate driving circuit118 can be electrically connected to the IC 116, but is not limitedthereto. In addition, the touch display device 10 further includes aplurality of first conductive connecting pads BPI, a plurality of secondconductive connecting pads BP2, and a plurality of third conductiveconnecting pads BP3 disposed in the peripheral region PR and disposed onthe substrate 100. The substrate 100 includes a bonding region 117disposed in the peripheral region PR, and the IC 116, the firstconductive connecting pads BP1, the second conductive connecting padsBP2, and the third conductive connecting pads BP3 are disposed in thebonding region 117.

The dummy signal lines DSL, the touch signal lines SSL, and the datalines DL extend from the display region DR to the bonding region 117 inthe peripheral region PR. The dummy signal lines DSL are electricallyconnected to the first conductive connecting pads BP1, the touch signallines SSL are electrically connected to the second conductive connectingpads BP2, and the data lines DL are electrically connected to the thirdconductive connecting pads BP3. It is noteworthy that FIG. 7C only showsthe dummy signal lines DSL, the touch signal lines SSL, the data linesDL, the first conductive connecting pads BP1, the second conductiveconnecting pads BP2, and the third conductive connecting pads BP3 andomits the IC 116 in the bonding region 117.

In this embodiment, the IC 116 can include the source driving circuitand the touch sensing circuit, but is not limited thereto. The IC 116can be disposed on the substrate 100 and the IC 116 can be a chip orsystem on glass (SOG), but is not limited thereto. In an embodimentwherein the IC 116 is a chip disposed on the substrate 100, the IC 116includes a plurality of bonding pads, where at least a portion of thebonding pads are disposed corresponding to and electrically connected tothe first conductive connecting pads BP1, the second conductiveconnecting pads BP2, and the third conductive connecting pads BP3.

In a modification, the IC 116 can be a chip, and the chip is disposed onthe flexible or rigid circuit board which is electrically connected tothe conductive connecting pads on the substrate 100, wherein theconductive connecting pads are electrically connected to the dummysignal lines DSL, the touch signal lines SSL, and the data lines DL.

In this embodiment, the gate driving circuit 118 is electricallyconnected to the IC 116. The IC 116 outputs the data signals to the datalines DL and the control signals to the gate driving circuit 118. The IC116 also transmits and/or receives touch sensing signals, but is notlimited thereto.

In a modification, the control signals of the gate driving circuit 118can be provided by the other control chip, and/or the touch sensingsignals are transmitted and/or received by the other touch sensing chip.

Additionally, in this embodiment, the gate driving circuit 118 is thegate driver on array (GOA) circuit structure, but is not limitedthereto. In a modification, the gate driving circuit 118 can be a chip,and the chip is disposed on the substrate 100 or disposed on theflexible or rigid circuit board which is electrically connected to theconductive connecting pads on the substrate 100, and the conductiveconnecting pads can be electrically connected to the corresponding scanlines SL.

In addition, as shown in FIG. 1, the touch display device 10 of thisembodiment includes two gate driving circuits 118 disposed out of thedisplay region DR and by two sides of the display region DR in the firstdirection D1. That is, the display region DR can be disposed between twogate driving circuits 118, but is not limited thereto. The location andnumber of the gate driving circuit 118 can be adjusted according to thedesign. In other embodiments, the touch display device 10 can onlyinclude one gate driving circuit 118 disposed by a side of the displayregion DR. The gate driving circuit 118 can include a plurality of shiftregisters and a plurality of signal lines, but is not limited thereto.

In addition, each of the scan lines SL in the display region DR (asshown in FIG. 4) can be electrically connected to at least one of thegate driving circuits 118, and the gate driving circuits 118 can outputthe scan signals to the corresponding scan lines SL. In this embodiment,the gate driving circuits 118 can be electrically connected to the IC116 through the conductive lines 120. Thus, the control signals (ex.start signals and/or clock signals) provided by the IC 116 can betransmitted to the gate driving circuits 118, and the gate drivingcircuits 118 can output scan signals to the corresponding scan lines SLin the display region DR. The touch signal lines SSL are electricallyconnected to the IC 116, and the IC 116 can transmit and/or receivetouch sensing signals. Additionally, the dummy signal lines DSL and thedata lines DL in FIG. 4 can also be electrically connected to the IC 116in FIG. 1, and the IC 116 can transmit the image gray level signals tothe data lines DL.

As shown in FIG. 7A and FIG. 7B, the arrangement of the dummy signallines DSL, the touch signal lines SSL, and the data lines DL in thedisplay region DR along the first direction D1 can sequentially be threedata lines DL (including the data lines DL_1, DL_2, and DL_3electrically connected to the sub-pixels SP corresponding to differentcolors), one touch signal line SSL (or one dummy signal line DSL), threedata lines DL, one touch signal line SSL (or one dummy signal line DSL),and so on. The dummy signal lines DSL, the touch signal lines SSL, andthe data lines DL in the display region DR are formed of the secondmetal layer 106.

In order to reduce the area of disposing the dummy signal lines DSL, thetouch signal lines SSL, and the data lines DL in the peripheral regionPR, two adjacent lines thereof may be respectively at least partiallyformed of the first metal layer 104 and the second metal layer 106 inthe peripheral region PR, such that the two adjacent lines are at leastpartially overlapped with each other in the peripheral region PR.

For example, in the peripheral region PR, two adjacent data lines DL canbe at least partially formed of the first metal layer 104 and the secondmetal layer 106, respectively, one and the other of adjacent dummysignal line DSL and data line DL can be at least partially formed of thefirst metal layer 104 and the second metal layer 106, respectively,and/or one and the other of adjacent touch signal line SSL and data lineDL can be at least partially formed of the first metal layer 104 and thesecond metal layer 106, respectively.

Accordingly, one of the data lines DL at least partially overlaps anadjacent data line DL, one of the dummy signal lines DSL at leastpartially overlaps an adjacent data line DL and/or one of the touchsignal lines SSL at least partially overlaps an adjacent data line DL inthe peripheral region PR, and the area of disposing the dummy signallines DSL, the touch signal lines SSL, and the data lines DL in theperipheral region PR can be reduced.

For example, as shown in FIG. 7A and FIG. 7B, the data line DL_1includes a first portion DL_1 a formed of the second metal layer 106 anda second portion DL_1 b formed of the first metal layer 104. In thisembodiment, the first portion DL_1 a overlaps a portion of the secondportion DL_1 b (i.e. the first portion DL_1 a overlaps the right half ofthe second portion DL_1 b), and the structure including the firstportion DL_1 a and the portion of the second portion DL_1 b is marked asDL_1 b(104)/DL_1 a(106) in FIG. 7A and FIG. 7B, but not limited thereto.

As shown in FIG. 7A, FIG. 7B and FIG. 7D, at least one first contacthole THa penetrates the insulating layer INS2, and at least one secondcontact hole THb penetrates the insulating layer INS1, INS2. The firstcontact hole THa exposes a portion of the first portion DL_1 a, and thesecond contact hole THb exposes a portion of the second portion DL_1 b.At least one bridge electrode 124 is disposed on the insulating layerINS2, and each bridge electrode 124 covers and extends into thecorresponding first contact holes THa and the corresponding secondcontact holes THb to be in contact with the corresponding first portionDL_1 a and the corresponding second portion DL_1 b, therefore, the firstportion DL_1 a formed of the second metal layer 106 is electricallyconnected to the second portion DL_1 b formed of the first metal layer104 through the bridge electrode 124.

The bridge electrode 124 may be a portion of the second transparentconductive layer 110 or the first transparent conductive layer 108, theinsulating layer INS1 may include a portion of the gate insulating layerGI, and the insulating layer INS2 may include a portion of at least oneof the first insulating layer 112 and the second insulating layer 114,but not limited thereto.

In the embodiment where the bridge electrode 124 is a portion of thesecond transparent conductive layer 110 or the first transparentconductive layer 108, the bridge electrode 124 is separated andelectrically isolated from the pixel electrodes PE and the commonelectrodes CE.

In a modification, the bridge electrode 124 may be at least a portion ofa conductive layer different from the second transparent conductivelayer 110 and the first transparent conductive layer 108. As shown inFIG. 7A, FIG. 7B and FIG. 7D, the bridge electrode 124 fills the firstcontact holes THa and is in contact with the first portions DL_1 aexposed by the first contact holes THa, and the bridge electrode 124also fills the second contact holes THb and is in contact with thesecond portions DL_1 b exposed by the second contact holes THb. The dataline DL_1 is changed from the second metal layer 106 to the first metallayer 104 through the first contact holes THa, the second contact holesTHb, and the bridge electrode 124, and the adjacent data line DL_2 isstill formed of the second metal layer 106. Therefore, the adjacent datalines DL_1, DL_2 can at least partially overlap each other in theperipheral region PR and the overlapped portion is marked asDL_1(104)/DL_2 (106) in FIG. 7A, FIG. 7B and FIG. 7C.

The structure including the first contact holes THa, the second contactholes THb, and the bridge electrode 124 may be called as a metal layertransferring structure electrically connecting the first metal layer 104and the second metal layer 106. The structure of the metal layertransferring structure is not limited to the above-describedembodiments.

FIG. 8A is a schematic diagram illustrating an enlargement of a portionof a region A in FIG. 1 according to a variant embodiment, and FIG. 8Bis a schematic diagram illustrating a cross-sectional diagram takenalong line B-B′ in FIG. 8A. It is noted that FIG. 8A is similar to FIG.7A, and the difference is that the metal layer transferring structuresin FIG. 8A is different from that in FIG. 7A. In the variant embodiment,the first portion DL_1 a and the second portion DL_1 b are at leastpartially overlapped, at least one insulating layer INS1 is disposedbetween the first portion DL_1 a and the second portion DL_1 b, and theat least one insulating layer INS1 includes at least one contact holeTHc exposing a portion of the second portion DL_1 b. The first portionDL_1 a covers the corresponding contact hole THc, and fills the contacthole THc and is in contact with the second portions DL_1 b exposed bythe contact hole THc. Therefore, the data line DL_1 is changed from thesecond metal layer 106 to the first metal layer 104 through the at leastone contact hole THc of the at least one insulating layer INS1 betweenthe first portion DL_1 a and the second portion DL_1 b.

Referring to FIGS. 7A-7C, the overlapped data lines DL_1, DL_2 canextend to the region near the first conductive connecting pads BP1 orthe second conductive connecting pads BP2 and then separate (i.e. notoverlap) and extend to the corresponding third conductive connectingpads BP3. Similarly, the data line DL_3 is changed from the second metallayer 106 to the first metal layer 104 through the metal layertransferring structure, and the adjacent dummy signal line DSL (or thetouch signal line SSL) is still formed of the second metal layer 106.Therefore, the adjacent data line DL_3 and the dummy signal line DSL (orthe touch signal line SSL) can overlap each other, and the overlappedportion is marked as DL_3(104)/DSL(106) or DL_3(104)/SSL(106) in FIG. 7Aand FIG. 7B.

The overlapped data line DL_3 and the dummy signal line DSL (or thetouch signal line SSL) can extend to the region near the firstconductive connecting pads BP1 or the second conductive connecting padsBP2 and then separate (i.e. not overlap) and extend to the correspondingthird conductive connecting pad BP3 and the corresponding firstconductive connecting pad BP1 (or the corresponding second conductiveconnecting pad BP2). In the above embodiment, the dummy signal linesDSL, the touch signal lines SSL, and a portion of the data lines DL(e.g. DL_2) are formed of the second metal layer 106 in the displayregion DR and the peripheral region PR. The rest of the data lines DL(e.g. DL_1 and DL_3) are changed from the second metal layer 106 to thefirst metal layer 104 by the metal layer transferring structures in theperipheral region PR, but this is not limited thereto.

In a variant embodiment, the arrangement of the dummy signal lines DSL,the touch signal lines SSL, and the data lines DL in the display regionDR is the same as FIG. 7A or FIG. 7B, and the difference is that in thisvariant embodiment, the dummy signal lines DSL, the touch signal linesSSL, and a portion of the data lines DL (e.g. DL_2) are changed from thesecond metal layer 106 to the first metal layer 104 by the metal layertransferring structures in the peripheral region PR, and the rest of thedata lines DL (e.g. DL_1 and DL_3) are formed of the second metal layer106 in the display region DR and the peripheral region PR.

In this variant embodiment, the dummy signal lines DSL, the touch signallines SSL, and the data lines DL are formed of the second metal layer106 in the display region DR, and the dummy signal lines DSL, the touchsignal lines SSL, and a portion of the data lines DL are changed fromthe second metal layer 106 to the first metal layer 104 by the metallayer transferring structures in the peripheral region PR. Therefore,one of the data lines DL partially overlaps an adjacent data line DL inthe peripheral region PR, one of the dummy signal lines DSL partiallyoverlaps an adjacent data line DL and/or one of the touch signal linesSSL partially overlaps an adjacent data line DL in the peripheral regionPR.

It is noted that in the FIG. 7A, FIG. 7B and the variant embodiment, thedata line DL_1 is at least partially overlapped with the data line DL_2which is located at the right side thereof in the peripheral region PR,and the data line DL_3 is at least partially overlapped with the touchsignal line SSL or the dummy signal line DSL which is adjacent thereto(e.g. the touch signal line SSL or the dummy signal line DSL which islocated at the right side of the data line DL_3) in the peripheralregion PR, but this is not limited thereto.

FIG. 9 is a schematic diagram illustrating an enlargement of a portionof a region A in FIG. 1 according to another variant embodiment. In theanother variant embodiment, the data line DL_1 is at least partiallyoverlapped with the touch signal line SSL or the dummy signal line DSLwhich is adjacent thereto (e.g. the touch signal line SSL or the dummysignal line DSL which is located at the left side of the data line DL_1)in the peripheral region PR, and the data line DL_3 is at leastpartially overlapped with the data line DL_2 which is located at theleft side thereof in the peripheral region PR.

In the another variant embodiment, the dummy signal lines DSL, the touchsignal lines SSL, and a portion of the data lines DL (e.g. DL_2) arechanged from the second metal layer 106 to the first metal layer 104 bythe metal layer transferring structures in the peripheral region PR, andthe rest of the data lines DL (e.g. DL_1 and DL_3) are formed of thesecond metal layer 106 in the display region DR and the peripheralregion PR, but not limited thereto.

In a modification, the dummy signal lines DSL, the touch signal linesSSL, and a portion of the data lines DL (e.g. DL_2) are formed of thesecond metal layer 106 in the display region DR and the peripheralregion PR, and the rest of the data lines DL (e.g. DL_1 and DL_3) arechanged from the second metal layer 106 to the first metal layer 104 bythe metal layer transferring structures in the peripheral region PR. Themetal layer transferring structure in FIG. 9 is similar to that in FIG.7A and FIG. 7B, therefore, the details will not be repeated herein.

In another modification, the metal layer transferring structure in FIG.9 may be replaced by a metal layer transferring structure similar tothat in FIG. 8A.

Note that in order to illustrate more clearly the arrangement of thedata lines DL_1, DL_2, DL_3, the dummy signal lines DSL and the touchsignal lines SSL in FIG. 7A, FIG. 7B, FIG. 8A and FIG. 9, the dummysignal lines DSL_1, DSL_2, DSL_3, DSL_4, DSL_5, DSL_6, the touch signallines SSL_1, SSL_2, SSL_3, SSL_4, SSL_5, SSL_6, the data lines DL_11,DL_12, DL_13, DL_14, DL_15, DL_16, DL_17, DL_18, the data lines DL_21,DL_22, DL_23, DL_24, DL_25, DL_26, DL_27, DL_28 and the data linesDL_31, DL_32, DL_33, DL_34, DL_35, DL_36, DL_37, DL_38 are marked inFIG. 7A, FIG. 7B, FIG. 8A and FIG. 9. In FIG. 7A, FIG. 7B, FIG. 8A andFIG. 9, the dummy signal lines DSL are electrically connected to theelectric potential line 122 through the metal layer transferringstructures, but is not limited thereto. In addition, in a modification,any one of the dummy signal lines DSL_1, DSL_2, DSL_3, DSL_4, DSL_5,DSL_6 in FIG. 7A, FIG. 7B, FIG. 8A and FIG. 9 may be replaced by a touchsignal line SSL which is not connected to the electric potential line122, and/or any one of the touch signal lines SSL_1, SSL_2, SSL_3,SSL_4, SSL_5, SSL_6 in FIG. 7A, FIG. 7B, FIG. 8A and FIG. 9 may bereplaced by a dummy signal line DSL, and details that are similar tothose described previously in the embodiments of FIG. 7A, FIG. 7B, FIG.8A and FIG. 9 will not be repeated herein. For example, the dummy signalline DSL_3 in FIG. 7A may be replaced by a touch signal line SSL. InFIG. 9, the dummy signal line DSL_6 may be replaced by a touch signalline SSL, and the touch signal line SSL is at least partially overlappedwith the data line DL_17 in the peripheral region PR. In FIG. 7B, thetouch signal line SSL_3 may be replaced by a dummy signal line, and thedummy signal line which replaces the touch signal line SSL_3 is at leastpartially overlapped with the data line DL_34 in the peripheral regionPR. In FIG. 7B, the dummy signal line DSL_3 may be replaced by a touchsignal line. In FIG. 9, the dummy signal line DSL_6 may be replaced by atouch signal line, and the touch signal line which replaces the dummysignal line DSL_6 is at least partially overlapped with the data lineDL_17 in the peripheral region PR.

It is noted that the first metal layer 104 is disposed below the secondmetal layer 106 in FIG. 5, FIG. 7D and FIG. 8B, but not limited thereto.In another embodiment, the first metal layer 104 is disposed above thesecond metal layer 106. For example, in a touch display device includinga top-gate thin film transistor, the first metal layer 104 including thescan line SL and the gate G of the thin film transistor T is disposedabove the second metal layer 106 including the source S and the drain Dof the thin film transistor T and the data line DL.

In addition, in a variant embodiment, the first metal layer 104 may notinclude the scan line SL and the gate G of the thin film transistor T,in other words, the scan line SL, the gate G of the thin film transistorT may be formed of a metal layer different from the first metal layer104 in FIGS. 7A-7D, FIGS. 8A-8B and FIG. 9.

In the present invention, the first metal layer 104 may be disposedbelow or above the second metal layer 106 in the overlapped portionsDL_1 b(104)/DL_1 a(106), DL_1(104)/DL_2(106), DL_3(104)/DSL(106),DL_3(104)/SSL(106), DSL(104)/DL_1(106), DL_2 (104)/DL_3 (106), SSL(104)/DL_1(106) in FIGS. 7A-7C, FIG. 8A and FIG. 9 in the presentinvention.

To summarize, in the present invention, a touch display device comprisesa plurality of data lines and a plurality of touch signal lines disposedon a substrate, a first data line, a second data line and a third dataline of the plurality of data lines are located between a first touchsignal line and a second touch signal line of the plurality of touchsignal lines in the display region, and in the peripheral region, one ofthe first and the second touch signal lines is at least partiallyoverlapped with one of the first to the third data lines, and the othersof the first to the third data lines are at least partially overlappedwith each other; in the display region, the first data line may beadjacent to and located between the first touch signal line and thesecond data line, and the third data line may be adjacent to and locatedbetween the second data line and the second touch signal line, and inthe peripheral region, the third data line may be at least partiallyoverlapped with the second touch signal line, and the first data linemay be at least partially overlapped with the second data line. Forexample, in FIG. 7B, the touch signal lines SSL_2, SSL_3 may berespectively called as the first and the second touch signal lines, andthe data lines DL_14, DL_24, DL_34 may be respectively called as thefirst, the second and the third data lines; in FIG. 9, the touch signallines SSL_6, SSL_5 may be respectively called as the first and thesecond touch signal lines, and the data lines DL_38, DL_28, DL_18 may berespectively called as the first, the second and the third data lines.In the peripheral region, at least a portion of the first data line andat least a portion of the third data line may be formed of a first metallayer, the second data line and the second touch signal line may beformed of a second metal layer, and in the display region, the firstdata line, the second data line, the third data line, the first touchsignal line and the second touch signal line may be formed of the secondmetal layer; each of the first data line and the third data line maycomprise a first portion and a second portion, the first portion and thesecond portion of the first data line and the first portion and thesecond portion of the third data line may be located in the peripheralregion, the first portion of the first data line and the first portionof the third data line may be formed of the second metal layer, thesecond portion of the first data line and the second portion of thethird data line may be formed of the first metal layer, at least aportion of the second portion of the first data line may be overlappedwith a portion of the second data line, and at least a portion of thesecond portion of the third data line may be overlapped with a portionof the second touch signal line, but the present invention is notlimited thereto. In a modification, in the peripheral region, at least aportion of the second data line and at least a portion of the secondtouch signal line may be formed of a first metal layer, the first dataline and the third data line may be formed of a second metal layer, andin the display region, the first data line, the second data line, thethird data line, the first touch signal line and the second touch signalline may be formed of the second metal layer; each of the second dataline and the second touch signal line may comprise a first portion and asecond portion, the first portion and the second portion of the seconddata line and the first portion and the second portion of the secondtouch signal line may be located in the peripheral region, the firstportion of the second data line and the first portion of the secondtouch signal line may be formed of the second metal layer, the secondportion of the second data line and the second portion of the secondtouch signal line may be formed of the first metal layer, at least aportion of the second portion of the second data line may be overlappedwith a portion of the first data line, and at least a portion of thesecond portion of the second touch signal line may be overlapped with aportion of the third data line, but the present invention is not limitedthereto. The touch display device may further comprise at least onedummy signal line and/or the plurality of touch signal lines may furthercomprise a third touch signal line. In the embodiment where the touchdisplay device further comprises at least one dummy signal line, thetouch display device may further comprise a first dummy signal linedisposed on the substrate, the plurality of data lines may furthercomprise a fourth data line, a fifth data line and a sixth data line,and the fourth data line, the fifth data line and the sixth data linemay be located between the second touch signal line and the first dummysignal line in the display region; in the display region, the fourthdata line may be adjacent to and located between the second touch signalline and the fifth data line, the sixth data line may be adjacent to andlocated between the fifth data line and the first dummy signal line, andin the peripheral region, the sixth data line may be at least partiallyoverlapped with the first dummy signal line, and the fourth data linemay be at least partially overlapped with the fifth data line. Forexample, in FIG. 9, the dummy signal line DSL_6 may be called as thefirst dummy signal line, and the data lines DL_37, DL_27, DL_17 may berespectively called as the fourth, the fifth and the sixth data lines.As described above, any one of the dummy signal lines DSL_1, DSL_2,DSL_3, DSL_4, DSL_5, DSL_6 in FIG. 7A, FIG. 7B, FIG. 8A and FIG. 9 maybe replaced by a touch signal line SSL, and/or any one of the touchsignal lines SSL_1, SSL_2, SSL_3, SSL_4, SSL_5, SSL_6 in FIG. 7A, FIG.7B, FIG. 8A and FIG. 9 may be replaced by a dummy signal line DSL,therefore, in FIG. 7B, if the dummy signal line DSL_3 is replaced by atouch signal line and the touch signal line SSL_3 is replaced by a dummysignal line which is also called as the first dummy signal line, thetouch signal line which replaces the dummy signal line DSL_3 and thetouch signal line SSL_2 may be respectively called as the first and thesecond touch signal lines, and the data lines DL_13, DL_23, DL_33,DL_14, DL_24, DL_34 may be respectively called as the first, the second,the third, the forth, the fifth and the sixth data lines. In theperipheral region, at least a portion of the first data line, at least aportion of the third data line, at least a portion of the fourth dataline and at least a portion of the sixth data line may be formed of afirst metal layer, the second data line, the second touch signal line,the fifth data line and the first dummy signal line may be formed of asecond metal layer, and in the display region, the first data line, thesecond data line, the third data line, the fourth data line, the fifthdata line, the sixth data line, the first touch signal line, the secondtouch signal line and the first dummy signal line may be formed of thesecond metal layer, but the present invention is not limited thereto. Ina modification, in the peripheral region, at least a portion of thesecond data line, at least a portion of the second touch signal line, atleast a portion of the fifth data line and at least a portion of thefirst dummy signal line may be formed of a first metal layer, the firstdata line, the third data line, the fourth data line and the sixth dataline are formed of a second metal layer, and in the display region, thefirst data line, the second data line, the third data line, the fourthdata line, the fifth data line, the sixth data line, the first touchsignal line, the second touch signal line and the first dummy signalline may be formed of the second metal layer. In the embodiment wherethe plurality of touch signal lines further comprise a third touchsignal line, the plurality of data lines may further comprise a fourthdata line, a fifth data line and a sixth data line, and the fourth dataline, the fifth data line and the sixth data line may be located betweenthe first touch signal line and the third touch signal line in thedisplay region; in the display region, the fourth data line may beadjacent to and located between the third touch signal line and thefifth data line, the sixth data line may be adjacent to and locatedbetween the fifth data line and the first touch signal line, and in theperipheral region, the sixth data line may be at least partiallyoverlapped with the first touch signal line, and the fourth data linemay be at least partially overlapped with the fifth data line. Forexample, in FIG. 7B, if the dummy signal line DSL_3 is replaced by atouch signal line which is also called as the third touch signal line,the data lines DL_13, DL_23, DL_33 may be respectively called as thefourth, the fifth and the sixth data lines; in FIG. 9, if the dummysignal line DSL_6 is replaced by a touch signal line, the touch signalline SSL_5, the touch signal line which replaces the dummy signal lineDSL_6 and the touch signal line SSL_6 may be respectively called as thefirst, the second and the third touch signal lines, and the data linesDL_37, DL_27, DL_17, DL_38, DL_28, DL_18 may be respectively called asthe first, the second, the third, the forth, the fifth and the sixthdata lines. In the peripheral region, at least a portion of the firstdata line, at least a portion of the third data line, at least a portionof the fourth data line and at least a portion of the sixth data linemay be formed of a first metal layer, the second data line, the secondtouch signal line, the fifth data line and the first touch signal linemay be formed of a second metal layer, and in the display region, thefirst data line, the second data line, the third data line, the fourthdata line, the fifth data line, the sixth data line, the first touchsignal line, the second touch signal line and the third touch signalline may be formed of the second metal layer, but the present inventionis not limited thereto. In a modification, in the peripheral region, atleast a portion of the second data line, at least a portion of thesecond touch signal line, at least a portion of the fifth data line andat least a portion of the first touch signal line may be formed of afirst metal layer, the first data line, the third data line, the fourthdata line and the sixth data line may be formed of a second metal layer,and in the display region, the first data line, the second data line,the third data line, the fourth data line, the fifth data line, thesixth data line, the first touch signal line, the second touch signalline and the third touch signal line may be formed of the second metallayer.

In addition, the order and arrangement of the first conductiveconnecting pads BPI, the second conductive connecting pads BP2, and thethird conductive connecting pads BP3 are determined by the order andarrangement of the bonding pads in the IC 116. In the prior art, thedummy signal lines are randomly interposed among the touch signal lines,and each of at least one of the dummy signal lines and each of at leastone of the touch signal lines need to cross at least three data lines inthe first direction D1 to electrically connect the correspondingconductive connecting pads in the peripheral region PR. Accordingly, inorder to avoid shorting between the data line and the dummy signal line(or the touch signal line) crossing each other, the at least three datalines crossing the dummy signal line (or the touch signal line) areformed of a metal layer different from that of the dummy signal line (orthe touch signal line) in the peripheral region PR, therefore any twoadjacent ones of the at least three data lines cannot be overlapped witheach other, or the dummy signal line or the touch signal line needs toadopt a plurality of metal layer transferring structures to cross the atleast three data lines in the peripheral region PR, thus the area ofdisposing these conductive lines cannot be effectively reduced.According to the unique arrangement of the dummy signal lines DSL andthe touch signal lines SSL in the present invention (e.g. the embodimentof Table 1), each of the dummy signal lines DSL and each of the touchsignal lines SSL of this embodiment do not need to cross data lines DLin the peripheral region PR to electrically connect the correspondingfirst conductive connecting pad BP1 and the corresponding secondconductive connecting pad BP2. Therefore, two of the adjacent data linesDL can be formed of different metal layers and overlap each other, thedummy signal line DSL and the adjacent data line DL can be formed ofdifferent metal layers and overlap each other, and/or the touch signalline SSL and the adjacent data line DL can be formed of different metallayers and overlap each other in the peripheral region PR, and the areaof disposing the dummy signal lines DSL, the touch signal lines SSL, andthe data lines DL in the peripheral region PR can be reduced. In thisembodiment, one touch signal line SSL or one dummy signal line DSL isdisposed corresponding to every three data lines DL, and therefore thenumber of third conductive connecting pads BP3 is three times the sum ofthe number of first conductive connecting pads BP1 and the number ofsecond conductive connecting pads BP2, but not limited thereto. Thefirst conductive connecting pads BP1 and the second conductiveconnecting pads BP2 can be arranged to form a first conductiveconnecting pad row BPR1 along the first direction D1, and the thirdconductive connecting pads BP3 can be arranged to form at least onesecond conductive connecting pad row BPR2 along the first direction D1.In this embodiment, the first conductive connecting pad row BPR1 isparallel to the second conductive connecting pad rows BPR2, but is notlimited thereto. Additionally, the first conductive connecting pad rowBPR1 can be disposed between the second conductive connecting pad rowsBPR2 and the display region DR, but is not limited thereto. In amodification, the second conductive connecting pads BP2 can be disposedbetween the first conductive connecting pad row BPR1 and the displayregion DR. Additionally, in FIG. 7C, the first conductive connectingpads BP1 and the second conductive connecting pads BP2 in the firstconductive connecting pad row BPR1 partially overlap the thirdconductive connecting pads BP3 in the adjacent second conductiveconnecting pad row BPR2 in the second direction D2, and the thirdconductive connecting pads BP3 in two adjacent second conductiveconnecting pad rows BPR2 partially overlap each other in the seconddirection D2, but this is not limited thereto. In a modification, theconductive connecting pads in two adjacent conductive connecting padrows are staggered and not overlapped in the second direction D2. Inaddition, the dummy signal lines DSL of the present invention are notelectrically connected to the touch electrodes 102. The first conductiveconnecting pads BP1 electrically connected to the dummy signal lines DSLcan be floating, but this is not limited thereto. In other embodiments,the IC 116 or other chips can provide a fixed electric potential to thefirst conductive connecting pads BP1, thus the dummy signal lines DSLcan have the fixed electric potential and the visual effect of the touchdisplay device 10 is prevented from being affected by noise coupling ofthe floating dummy signal lines DSL. For example, the IC 116 or otherchips can provide a common voltage to the first conductive connectingpads BP1, and the electric potential of the dummy signal lines DSL canbe equivalent to the common voltage.

Referring to FIG. 1, the touch display device 10 in this embodimentfurther includes an electric potential line 122 disposed in theperipheral region PR and on the substrate 100. The electric potentialline 122 of this embodiment includes a ring structure disposed betweenthe display region DR and the gate driving circuits 118 and between thedisplay region DR and the bonding area 117, where the electric potentialline 122 can surround the display region DR, but is not limited thereto.In other embodiments, the electric potential line 122 can have differentdesigns according to different requirements. As shown in FIG. 1, theelectric potential line 122 of this embodiment includes a closedrectangle ring structure, but is not limited thereto. For example, theshape of the ring structure may be a rectangle, a polygon, an irregularshape or other shapes. The ring structure can be a closed structure,wherein two ends of the electric potential line 122 connect with eachother. The ring structure can also be a non-closed structure, whereintwo ends of the electric potential line 122 do not connect with eachother. In some embodiments, the structure of the electric potential line122 may not be the ring structure. Although the electric potential line122 crosses the touch signal lines SSL as shown in FIG. 1, in fact theelectric potential line 122 is not electrically connected to the touchsignal lines SSL. The electric potential line 122 and the touch signallines SSL are electrically isolated. For example, at least a portion ofthe electric potential line 122 and at least a portion of each of thetouch signal lines SSL may be formed of different conductive layers, andat least one insulating layer is disposed between the differentconductive layers. FIG. 12 is a schematic diagram illustrating anenlargement of a region X in FIG. 1, and FIG. 13 is a schematic diagramillustrating an enlargement of a region Yin FIG. 1. As shown in FIG. 12and FIG. 13, portions of the electric potential line 122 in the region Xand the region Y extend in the first direction D1, and the electricpotential line 122 is disposed close to the display region DR. Theelectric potential line 122 of this embodiment is a portion of the firstmetal layer 104, i.e. the electric potential line 122 is formed of thefirst metal layer 104. The dummy signal lines DSL substantially extendin the second direction D2. The dummy signal lines DSL extend across twoopposite edges (e.g. an upper edge and a lower edge) of the displayregion DR and extend into the peripheral region PR. The dummy signallines DSL continue extending in the second direction D2 to cross theelectric potential line 122 after the dummy signal lines DSL extend outof the display region DR. The dummy signal lines DSL are electricallyconnected to the electric potential line 122 in this embodiment. Forexample, each of the dummy signal lines DSL can include a contact pad CPdisposed on the electric potential line 122. The insulating layercovering the contact pads CP and the electric potential line 122includes at least one first contact hole THa and at least one secondcontact hole THb. Each of the first contact holes THa exposes a portionof the corresponding contact pad CP, and each of the second contactholes THb exposes a portion of the electric potential line 122. In thisembodiment, two first contact holes THa are disposed on each of thecontact pads CP, and two second contact holes THb adjacent to the firstcontact holes THa are disposed on the electric potential line 122. Thefirst contact holes THa and the second contact holes THb are arranged ina pattern of 2×2, but the arrangement and the numbers of the firstcontact holes THa and the second contact holes THb are not limitedthereto. Multiple bridge electrodes 124 are disposed on the insulatinglayer covering the contact pads CP and the electric potential line 122,and each of the bridge electrodes 124 covers the corresponding firstcontact holes THa and second contact holes THb. Each of the bridgeelectrodes 124 fills the corresponding first contact holes THa and is incontact with the portions of the corresponding contact pad CP exposed bythe first contact holes THa, and each of the bridge electrodes 124 alsofills the corresponding second contact holes THb and is in contact withthe corresponding portions of the electric potential line 122 exposed bythe second contact holes THb. Accordingly, the dummy signal lines DSLand the electric potential line 122 can be electrically connectedthrough the bridge electrodes 124. The bridge electrode 124 may be aportion of the second transparent conductive layer 110 or the firsttransparent conductive layer 108, and the bridge electrode 124 isseparated and electrically isolated from the pixel electrodes PE and thecommon electrodes CE, but not limited thereto. In a modification, atleast one insulating layer is disposed between the electric potentialline 122 and the dummy signal lines DSL, and the at least one insulatinglayer includes at least one contact hole exposing a portion of theelectric potential line 122. The dummy signal lines DSL covers thecorresponding contact hole, and fills the contact hole and is in contactwith the portion of the electric potential line 122 exposed by thecontact hole. Therefore, the dummy signal lines DSL and the electricpotential line 122 can be electrically connected through the at leastone contact hole of the at least one insulating layer between theelectric potential line 122 and the dummy signal lines DSL.Additionally, in the embodiment shown in FIG. 12 and FIG. 13, the dummysignal lines DSL extend across two opposite edges (e.g. an upper edgeand a lower edge) of the display region DR and extend into theperipheral region PR. The dummy signal lines DSL are electricallyconnected to a portion of the electric potential line 122 disposed abovethe display region DR and another portion of the electric potential line122 disposed below the display region DR in the second direction D2, andthe dummy signal lines DSL are electrically connected to the electricpotential line 122 through the metal layer transferring structures, butthis is not limited thereto. In a modification, the dummy signal linesDSL can only be electrically connected to a portion of the electricpotential line 122 disposed above the display region DR or a portion ofthe electric potential line 122 disposed below the display region DR. Inaddition, the dummy signal lines DSL may only extend across an edge(e.g. the lower edge) of the display region DR and extend into theperipheral region PR, and the dummy signal lines DSL may be electricallyconnected to the electric potential line through a metal layertransferring structure disposed on a portion of the electric potentialline 122 disposed by a side of the display region DR (e.g. below thedisplay region DR) in the second direction D2. In short, the dummysignal lines DSL can extend across at least one edge of the displayregion DR and extend into the peripheral region PR, and the dummy signallines DSL can be electrically connected to the electric potential line122 through at least one metal layer transferring structure disposed onat least one portion of the electric potential line 122 disposed by atleast one side of the display region DR.

The electric potential line 122 can have a fixed electric potential. Forexample, the electric potential line 122 of this embodiment can beelectrically connected to a common voltage source, and the electricpotential of the electric potential line 122 can be the common voltage,but this is not limited thereto. In other embodiments, the electricpotential of the electric potential line 122 can be grounded (GND) orother fixed electric potentials. Since the electric potential line 122and the dummy signal lines DSL of this embodiment are electricallyconnected, the common voltage can be applied to each of the dummy signallines DSL through the electric potential line 122. Further, the electricpotential line 122 of this embodiment can provide electrostaticprotection. For example, at least one of the scan lines SL, the datalines DL, or the gate driving circuits 118 can be electrically connectedto the electric potential line 122 through the electrostatic protectiondevice. The electrostatic charges in the touch display panel can bedischarged to the electric potential line 122 through the electrostaticprotection device in a short time. Therefore, the circuit components(e.g. the pixels PX and/or the gate driving circuits 118) can beprevented from being damaged by the electrostatic charges. In addition,the touch display device 10 can further selectively include an outerelectric potential line disposed in the peripheral region PR andsurrounding the electric potential line 122 (e.g. an inner electricpotential line). The IC 116 and the gate driving circuits 118 can bedisposed between the outer electric potential line and the electricpotential line 122. The outer electric potential line can receive afixed electric potential (e.g. common voltage or GND) and provideelectrostatic protection. Preferably, the electrical potential of theinner electric potential line is the same as that of the outer electricpotential line, and the inner electric potential line may be preferablyelectrically connected to the outer electric potential line through atleast one connecting line disposed on the substrate 100, but is notlimited thereto. In short, the touch display device 10 can include twoelectric potential lines. At least one of the scan lines SL, the datalines DL, or the gate driving circuits 118 can be electrically connectedto at least one of the inner electric potential line or the outerelectric potential line through at least one electrostatic protectiondevice to obtain electrostatic protection. For example, the touchdisplay device 10 includes an inner electric potential line and an outerelectric line, at least one conductive connecting pad electricallyconnected to the IC 116 or circuit board capable of supplying a commonvoltage is electrically connected to the outer electric line, the innerelectric potential line is electrically connected to the outer electricpotential line through at least one connecting line disposed on thesubstrate 100, and the gate driving circuits 118 is electricallyconnected to the inner electric potential line through at least oneelectrostatic protection device. When electrostatic charges accumulatein the gate driving circuits 118, the electrostatic charges aredischarged to the at least one conductive connecting pad through the atleast one electrostatic protection device, the inner electric potentialline, the at least one connecting line and the outer electric potentialline, thus the gate driving circuits 118 is prevented from damage. Inthis embodiment, the outer electric potential line can include anon-closed ring structure, but this is not limited thereto. For example,the connecting pads used for coupling to the flexible circuit board areusually disposed at the lower edge of the substrate 100. Therefore, theinner electric potential line can include the closed ring structure(e.g. rectangle structure) and the outer electric potential line caninclude the non-closed ring structure (e.g. reversed U-shapedstructure), and at least a portion of the gap between two ends of theouter electric potential line (e.g. an opening of the reversed U-shapedstructure) is located on the lower side of the substrate 100, such thatthe outer electric potential line can be prevented from beingelectrically connected to the connecting pads used for coupling to theflexible circuit board.

In addition, the touch display device 10 in some embodiments furtherincludes a plurality of switches disposed in the bonding region 117 fortesting defects of the touch electrodes 102 and the touch signal linesSSL. For example, open/short testing can be performed. Each of theswitches is coupled to the corresponding second conductive connectingpad BP2, wherein the second conductive connecting pads BP2 areelectrically connected to the touch electrodes 102 and the touch signallines SSL. Each of the switches may be a thin film transistor, and thetesting signals can be provided by the switches to the correspondingtouch signal lines SSL and the touch electrodes 102 for checking anabnormal phenomenon. For example, the switches include a plurality offirst switches and a plurality of second switches. The control terminals(e.g. gates of the thin film transistors) of the first switches and thecontrol terminals of the second switches are electrically connected.Each of the first terminals (e.g. the drain or the source of each thinfilm transistor) of the first switches is electrically connected to thecorresponding odd-numbered touch signal line SSL. Each of the firstterminals of the second switches is electrically connected to thecorresponding even-numbered touch signal line SSL. The second terminals(e.g. the other one of the drain and the source of each thin filmtransistor) of the first switches are electrically connected, and thesecond terminals of the second switches are electrically connected. Aturn-on voltage (e.g. high electric potential) is applied to the controlterminals of the first switches and the second switches to turn on allthe first switches and the second switches when the test is performed.Later, a group of the testing signals is applied to the second terminalsof the first switches, and another group of the testing signals isapplied to the second terminals of the second switches. Two groups ofthe testing signals are transmitted to the corresponding touch signallines SSL and the corresponding touch electrodes 102 through the firstswitches and the second switches that have been turned on. Additionally,the switches used for testing the data lines DL are also usuallydisposed in the bonding region 117, therefore the bonding region 117 maynot accommodate the switches for testing the touch electrodes 102 andthe touch signal lines SSL and the switches for testing the data lines102 simultaneously as the resolution increases. Therefore, the switchesused for testing the touch electrodes 102 and the touch signal lines SSLin some embodiments are disposed in a region between an upper edge ofthe substrate 100 and an upper edge of the display region DR in FIG. 1.One end of each of the touch signal lines SSL can extend from a loweredge of the display region DR to the bonding region 117 to be coupled tothe second conductive connecting pad BP2. The other end of each of thetouch signal lines SSL can extend from the upper edge of the displayregion DR to the switch used for testing the touch electrodes 102 andthe touch signal line SSL and disposed between the upper edge of thedisplay region DR and the upper edge of the substrate 100. In short, thetouch signal lines SSL substantially extend across two opposite edges(the upper edge and the lower edge) of the display region DR in thesecond direction D2 and extend into the peripheral region PR. One end ofeach of the touch signal lines SSL is coupled to the second conductiveconnecting pad BP2, and the other end of each of the touch signal linesSSL is coupled to the switch used for testing the touch electrodes 102and the touch signal line SSL.

The touch display device of the present invention is not limited to theaforementioned embodiment. The following description can be applied toother embodiments or modifications. To simplify the description and showthe difference between other embodiments, modifications and theabove-mentioned embodiment, identical components in each of thefollowing embodiments are marked with identical symbols, and theidentical features will not be redundantly described.

FIG. 14 is a schematic diagram illustrating a top view of a portion ofthe display region of the touch display device according to a secondembodiment of the present invention, and FIG. 15 is a schematic diagramillustrating a cross-sectional view of a sub-pixel of the touch displaydevice according to the second embodiment of the present invention. Asshown in FIG. 14 and FIG. 15, in the structure of each of the sub-pixelsSP in this embodiment, a portion of the pixel electrode PE of the firsttransparent conductive layer 108 is disposed between the drain D of thesecond metal layer 106 and the gate insulating layer GI, where the pixelelectrode PE is directly in contact with a portion of the drain D, butis not limited thereto. In this embodiment, the pixel electrodes PE canbe formed after the gate insulating layer GI is formed, and the drains Dcan be formed afterward. Additionally, each of the drains D covers andis in contact with a portion of one of the pixel electrodes PE. In thestructure of each of the sub-pixels SP in a modification, a portion ofthe drain D can be disposed between the pixel electrode PE and the gateinsulating layer GI, and the portion of the drain D is directly incontact with the pixel electrode PE. In this modification, the drains Dcan be formed after the gate insulating layer GI is formed, and thepixel electrodes PE can be formed afterward. Additionally, each of thepixel electrodes PE covers and is in contact with a portion of one ofthe drains D. In this embodiment, an insulating layer 126 is disposedbetween the second metal layer 106 and the second transparent conductivelayer 110 and disposed between the second transparent conductive layer110 and the first transparent conductive layer 108. The material of theinsulating layer 126 can be the same as that of the first insulatinglayer 112 or the second insulating layer 114 in the first embodiment,but is not limited thereto. The thickness of the insulating layer 126 ofthis embodiment can be greater than the thickness of the firstinsulating layer 112 or the thickness of the second insulating layer 114of the first embodiment, but is not limited thereto. For example, thethickness of the insulating layer 126 of this embodiment can be greaterthan or equal to 5500 angstroms to reduce the C loading of the commonelectrodes CE and the data lines DL or the C loading of the commonelectrodes CE and the scan lines SL, but is not limited thereto.Technical features in the display region DR or the peripheral region PRof the touch display device 10 in this embodiment are the same as thefirst embodiment, and will not be redundantly described here.

In summary, in the touch display device of the present invention, thetouch electrodes include the protruding portions at the edges (or thedisconnection locations), and the overlapping areas of the touchelectrodes and the scan lines at the edges of the touch electrodes areequal to the overlapping areas of the touch electrodes and the scanlines inside the touch electrodes, thus the difference between theresistive-capacitive loading of the touch electrodes and the scan linesat the edges of the touch electrodes and the resistive-capacitiveloading of the touch electrodes and the scan lines inside the touchelectrodes can be reduced. Each of the second openings in the touchelectrodes exposes a portion of one of the touch signal lines, meaningthe overlapping areas of the touch electrodes and the touch signal linescan be reduced, and the C loading of the touch electrodes and the touchsignal lines can be reduced. The above technical features can make thetouch display device achieve a better signal transmission effect. Inaddition, the dummy signal lines and the touch signal lines are dividedinto a plurality of groups in the touch display device of the presentinvention. In each group of the dummy signal lines and the touch signallines, the touch signal lines are disposed between a portion of thedummy signal lines and another portion of the dummy signal lines. Eachof the dummy signal lines and each of the touch signal lines do notrequire crossing at least three data lines in the peripheral region.Therefore, two of the adjacent data lines can be formed of differentmetal layers and overlap each other, each of the dummy signal lines andthe adjacent data line can be formed of different metal layers andoverlap each other, and each of the touch signal lines and the adjacentdata line can be formed of different metal layers and overlap each otherin the peripheral region, and the area of disposing the dummy signallines, the touch signal lines, and the data lines in the peripheralregion can be reduced. In addition, the electric potential line in thetouch display device can provide common voltage to the dummy signallines and the electrostatic protection.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the invention. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A touch display device comprising a displayregion and a peripheral region, the touch display device comprising: asubstrate; a plurality of scan lines and a plurality of data linesdisposed on the substrate; a plurality of thin film transistors disposedon the substrate, wherein each of the thin film transistors iselectrically connected to a corresponding scan line of the plurality ofscan lines and a corresponding data line of the plurality of data lines;a plurality of pixel electrodes disposed on the substrate and in thedisplay region, wherein each of the pixel electrodes is electricallyconnected to a drain of a corresponding thin film transistor of theplurality of thin film transistors; a plurality of touch electrodes anda plurality of touch signal lines disposed on the substrate, whereineach of the touch signal lines is electrically connected to acorresponding touch electrode of the plurality of touch electrodes; anda plurality of dummy signal lines disposed on the substrate, wherein theplurality of touch electrodes are arranged in i number of touchelectrode columns in a first direction and arranged in j number of touchelectrode rows in a second direction, the first direction is notparallel to the second direction, the plurality of touch signal linesand the plurality of dummy signal lines are divided into i number ofgroups in the first direction, each of the i number of groups comprisesj number of touch signal lines of the plurality of touch signal linesand k number of dummy signal lines of the plurality of dummy signallines, and the j number of touch signal lines are disposed between aportion of the k number of dummy signal lines and a remaining portion ofthe k number of dummy signal lines in each of the i number of groups,wherein i, j, and k are positive integers greater than or equal to two.2. The touch display device of claim 1, wherein each of the plurality oftouch signal line and each of the plurality of dummy signal linessubstantially extend along the second direction.
 3. The touch displaydevice of claim 1, a width of each of the plurality of dummy signallines is substantially the same as a width of each of the plurality oftouch signal lines in the display region.
 4. The touch display device ofclaim 1, each of the i number of touch electrode columns comprises jnumber of touch electrodes of the plurality of touch electrodes, andeach of the plurality of touch signal line penetrates a regioncorresponding to the j number of touch electrodes in a corresponding oneof the i number of touch electrode columns.
 5. The touch display deviceof claim 1, wherein the j number of touch signal lines are disposedbetween m number of the k number of dummy signal lines and (k-m) numberof the k number of dummy signal lines in one of the i number of groups,and the j number of touch signal lines are disposed between n number ofthe k number of dummy signal lines and (k-n) number of dummy signallines of the k number of dummy signal lines in another one of the inumber of groups, wherein m and n are positive integers greater than orequal to one, each of m and n is smaller than k, and n is different fromm.
 6. The touch display device of claim 1, wherein the j number of touchsignal lines are disposed between m number of the k number of dummysignal lines and (k-m) number of dummy signal lines of the k number ofdummy signal lines in each of the i number of groups, wherein m is aninteger greater than or equal to one, and m is smaller than k.
 7. Thetouch display device of claim 1, wherein the plurality of scan linescross the plurality of data lines to define a plurality of sub-pixels,the plurality of sub-pixels are arranged in a plurality of sub-pixelcolumns in the first direction and arranged in a plurality of sub-pixelrows in the second direction, one of the plurality of touch signal linesor one of the plurality of dummy signal lines is disposed adjacent toone of the plurality of sub-pixel columns or disposed between twoadjacent sub-pixel columns of the plurality of sub-pixel columns.
 8. Thetouch display device of claim 1, wherein three data lines of theplurality of data lines, a touch signal line of the plurality of touchsignal lines, another three data lines of the plurality of data linesand another touch signal line of the plurality of touch signal lines aresequentially disposed along the first direction in the display region.9. The touch display device of claim 1, wherein three data lines of theplurality of data lines, a touch signal line of the plurality of touchsignal lines, another three data lines of the plurality of data linesand a dummy signal line of the plurality of dummy signal lines aresequentially disposed along the first direction in the display region.10. The touch display device of claim 1, wherein the plurality of scanlines are formed of a first metal layer in the display region, and theplurality of data lines, the plurality of touch signal lines and theplurality of dummy signal lines are formed of a second metal layer inthe display region.
 11. The touch display device of claim 1, wherein theplurality of data lines comprise a first data line, a second data lineand a third data line, the first data line, the second data line and thethird data line are sequentially disposed along the first direction inthe display region, the first data line is at least partially overlappedwith the second data line in the peripheral region, and the third dataline is at least partially overlapped with one of the plurality of touchsignal lines in the peripheral region.
 12. The touch display device ofclaim 1, wherein the plurality of data lines comprise a first data line,a second data line and a third data line, the first data line, thesecond data line and the third data line are sequentially disposed alongthe first direction in the display region, the first data line is atleast partially overlapped with the second data line in the peripheralregion, and the third data line is at least partially overlapped withone of the plurality of dummy signal lines in the peripheral region. 13.The touch display device of claim 1, wherein the plurality of data linescomprise a first data line, a second data line and a third data line,the first data line, the second data line and the third data line aresequentially disposed along the first direction in the display region,the first data line is at least partially overlapped with one of theplurality of touch signal lines in the peripheral region, and the seconddata line is at least partially overlapped with the third data line inthe peripheral region.
 14. The touch display device of claim 1, whereinthe plurality of data lines comprise a first data line, a second dataline and a third data line, the first data line, the second data lineand the third data line are sequentially disposed along the firstdirection in the display region, the first data line is at leastpartially overlapped with one of the plurality of dummy signal lines inthe peripheral region, and the second data line is at least partiallyoverlapped with the third data line in the peripheral region.
 15. Thetouch display device of claim 1, wherein the touch display devicefurther comprises an electric potential line disposed on the substrateand in the peripheral region, the plurality of dummy signal lines areelectrically connected to the electric potential line, and the electricpotential line has a fixed electric potential.
 16. The touch displaydevice of claim 15, wherein an electric potential of the electricpotential line is a common voltage.
 17. The touch display device ofclaim 15, wherein the electric potential line surrounds the displayregion.
 18. The touch display device of claim 15, wherein the touchdisplay device further comprises a gate driving circuit disposed on thesubstrate and in the peripheral region, the gate driving circuit iselectrically connected to the plurality of scan lines, and a portion ofthe electric potential line is disposed between the gate driving circuitand the display region.